added blocking doors to paths.

src/scripts/enemy_bat.gd

@@ -21,6 +21,9 @@ func _ready():
 	damage = 5.0
 	
 	state_timer = idle_duration
+	
+	# CRITICAL: Ensure collision mask is set correctly (walls are on layer 7 = bit 6 = 64)
+	collision_mask = 1 | 2 | 64  # Collide with players (layer 1), objects (layer 2), and walls (layer 7 = bit 6 = 64)
 
 func _physics_process(delta):
 	# Always update animation (even when dead, and on clients)